The Microstructure of Ni-Based Superalloys

On Demand Until August 22, 2019

Duration:60 minutes


The webinar will cover the microstructure of cast and wrought Ni-based superalloys plus PM superalloys. Examples of microstructures in various conditions including: as-cast, as-hot worked, as-cold worked, and solution annealed, plus solution annealed and aged will be shown in B&W and with color etchants. The influence of solution annealing temperature on the grain size of superalloys will be illustrated. Various phases that can form in superalloys, such as carbides, delta and Laves phase will be shown. High-magnification images of γʹ and γʹʹ strengthening phases will also be shown.

Results using electron backscatter diffraction (EBSD) on superalloys solution annealed at different solution annealing temperatures to reveal the austenite grain structure will also be shown.

Key Topics:

  • Specimen preparation and etching (black and white and color)
  • As-cast microstructures and Powder Metallurgy microstructures
  • Wrought, hot-worked microstructures and solution annealed and then cold-worked microstructures
  • Delta phase, Laves, carbides, gamma prime and gamma double prime phases
  • Influence of solution annealing temperature on grain growth

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George Vander Voort

George Vander Voort, president of Vander Voort Consulting L.L.C. and consultant to Struers Inc., is a graduate of Drexel University and Lehigh University with a background in metallurgy and materials science and 29 years experience in the specialty steel industry. A past president of the International Metallographic Society and past chairman of ASTM Committee E-4 on Metallography, George has six patents and over 373 publications including Metallography: Principles and Practice (McGraw-Hill, 1984; ASMI, 1999) and the ASM video course, Principles of Metallography. He served as a trustee for ASM International, and is a member of several ASMI committees. He is vice president of Alpha Sigma Mu honorary scholastic society. He is a member of the editorial board of Praktische Metallographie and the International Journal of Microstructure and Materials Properties and is on the scientific committee of La Metallurgica Italiana. He was associate editor of Materials Characterization (1991-2004) and was on its editorial advisory board (1986-2007). He is a member of ASM International, IMS, ASTM, TMS, RMS, ISS, MSA, MAS, DGM, PSS. George is a fellow of ASMI, ASTM and IFHTSE and has 34 awards for his microscopy work including the Jacquet-Lucas Grand Prize and the Dubose-Crouse Award of the International Metallographic Contest. He was named a Distinguished Alumni of Drexel University and a fellow and Distinguished Lifetime Member of Alpha Sigma Mu honorary materials science society. He is an honorary member of the Polish Society for Stereology. He has given over 402 lectures in 39 countries; spoken 85 times at 52 ASM Chapters, and at 74 universities, and has taught 79 ASM Metals Engineering Institute courses, plus 117 seminars for Buehler Ltd and 33 for other societies. He is the author of 9 ASTM metallography standards and 2 ISO metallography standards. He is a past chairman of ASTM E-4 on Metallography and has represented the USA at ISO (TC 17/SC 7) since 1989. Five of his color micrographs have been used to make ties and scarves.



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